In a slump, the mental and physical combine to confuse, and the player ends up in a spiral. “You go up to the plate and you think about your weaknesses, and you start focusing on them, and you start chasing,” Brandon Moss said before a game against the Giants, adding “it all starts to spin around.” Since having offseason hip surgery, the Cardinals’ slugger has been spinning in both facets of the game.

A recent tear might be the result of getting right, though. An adjustment to his mechanics, a milestone in his workouts, and a slight tweak to his approach all recently came together. The result looks more like the Moss that averaged 33 home runs for every 600 plate appearances coming into this season.

To illustrate how he’s gotten his game back together, there might not be a better way than to have Moss take us through three plate appearances against Rubby de la Rosa last week. The pitcher got the better of him once, but when the batter did his damage, it was the result of a convergence of factors.

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Going into the season, Stephen Piscotty was projected to be a contact and patience guy because that’s what he’d been in the minor leagues for the most part. But this offseason, he had a plan, and he changed his approach and mechanics in order to be a better player. Perhaps the projections going forward are a little light, given the changes he’s made.

Preseason Steamer projections had Piscotty with a .114 isolated slugging percentage, on par with Logan Forsythe and Ryan Sweeney. After a power surge in Triple-A for 370 plate appearances, and four major league homers, the rest of season projection is now up to a .133 level, or Coco Crisp and Desmond Jennings level.

That’s improvement, but what if he’s fundamentally changed and the projections are still light?

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In batted-ball velocity numbers, we’ve got a new toy. It’s hard to know exactly how to use it, as it goes with many new statistical toys. Without even a full year of sample size, we have no idea how accurate the data coming in is, how sticky batted-ball velocity is year to year, or how much of a skill it is. Even worse, the data is incomplete — velocity without angle is somewhat useless, and the angle that’s coming through is only for home runs.

Is there a short-term fix? Is there a way to combine batted-ball velocity with existing stats to make it useful in the short term? I think there might be, and I think the stories of Xander Bogaerts and Adrian Beltre might help us find this patch.

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With the Cubs in San Francisco to face the team just behind them in the wild-card race, it makes sense to compare the two managers. After all, they both ended up within the top five in a recent ESPN.com survey, and their teams have both found success in recent years. Though they were born just a year apart, their styles are different enough that they seem to be a study in contrasts.

Who better to ask about what makes them great than their own players and coaches and beat writers? Well, maybe unbiased observers can be more critical than our sample, but the task at hand is to delineate the managers’ strengths.

So, what makes Bruce Bochy great? What makes Joe Maddon great?

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When faced with batters on base, Milwaukee Brewers righty Taylor Jungmann goes to his sinker more and throws lower in the zone. He hasn’t given up a home run on the sinker, and the pitch produces ground balls nearly three-quarters of the time. So why doesn’t Jungmann go to the sinker more often?

“What makes the sinker better is that I don’t throw it as much,” Jungmann told me before a game against San Francisco. “It makes it that much more effective because they aren’t looking for it. If I threw it every single pitch, my four-seamer would be better.”

Right now, Jungmann has found the right uses for his sinker. If he used it more, he’d get less value from each additional sinker. This is what makes evaluating pitches by their peripherals so difficult, especially in small samples. Sure, Mat Latos has gotten six whiffs on 24 changeups this year — for a percentage that’s almost twice the average changeup whiff rate — but that doesn’t make the pitch good.

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For his career, Nathan Eovaldi has a below-average strikeout rate. He’s been a little bit worse than league average by ERA, and a little bit better than league average by FIP, but even average is a strange outcome for a guy with a top-ten fastball by velocity.

Take a look at how much of an outlier Eovaldi is in graphical form. That’s him highlighted, against all starters that have thrown at least 1000 fastballs since 2007.

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The Mets are about to get all six of their best starters healthy again, as Steven Matz just had his second rehab start yesterday in his return from a strained muscle in his side. It looks like they’ll return to the six-man rotation. They should. The circumstances on this particular team make the six-man rotation a perfect match.

Yes, Matt Harvey made some waves when he complained that he didn’t know what to do with his extra day off after the Mets went to the six-man rotation. Turns out, he’s not alone. And yet, his rotation mates have a lot to teach him about maintaining a schedule with an extra day of rest.

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Brandon Crawford’s big power breakout has been a big part of the Giants’ good work so far this season despite an iffy rotation. Jeff Sullivan did a great job pointing out the changes he saw in Crawford’s swing, and the player agreed with most of his analysis. But Sullivan also pointed out that pitchers were in the middle of adjusting to the player, and it’s been Crawford’s adjustment(s) back to their adjustment that has helped him sustain the power into the late months.

One was mechanical, the other had to do with approach. Taking the two together really makes Crawford’s new power level seem sustainable, though.

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